Moor Park is a London Underground station in the Three Rivers district of Hertfordshire, serving those living on the Moor Park estate, and also on the neighbouring Eastbury and South Oxhey estates. The station is outside the Greater London boundary but is in both Zone 6 and Zone 7, between the Metropolitan line stations of Rickmansworth, Croxley and Northwood.

Three Rivers is a local government district in south-west Hertfordshire, England. Its council is based in Rickmansworth. The district borders Hertsmere, Watford, St Albans, Dacorum, Buckinghamshire, and the London boroughs of Hillingdon and Harrow.